Here's a legal (and um, not gross) way to be a peeping Tom: The Cooliris Previews download (for Firefox) is a fabulous enhancement for Google searches and blogs. After downloading Cooliris, search something in Google, and when your results come up, you'll notice a brand spankin' new magnifying glass icon to the right of each result.
Move your mouse over it, and you get a pop-up preview for that webpage result, no clicking required! It works for Image, Shopping, and Maps searches too — just move your cursor over the thumbnails, and again, a large preview just pops up for you. Try it on links in blog posts too — works there also! Your back button will thank you!